What is the chemical name of marble?

Calcium carbonate 

The correct answer is 4. Calcium carbonate.

The chemical name of marble is calcium carbonate.

Marble is primarily composed of calcium carbonate (\(CaCO_3\)), which is a common mineral found in sedimentary rocks. When limestone undergoes metamorphism under conditions of high pressure and temperature, it recrystallizes to form marble. Therefore, marble is essentially a metamorphosed form of limestone, and both limestone and marble share the same chemical composition of calcium carbonate.